Glass coating method and device, photovoltaic glass and solar cell

Abstract

The present application belongs to the field of glass processing technology, and in particular relates to a glass coating method and device, photovoltaic glass and solar cells; wherein the glass coating device can brush the coating liquid onto the surface of the coating roller along the rotation direction of the coating roller, thereby reducing the occurrence of sputtering caused by the coating liquid being poured directly from the top of the coating roller downward onto the surface of the coating roller, improving the uniformity of the distribution of the coating liquid on the surface of the coating roller, and being beneficial to improving the quality of glass coating, thereby solving the technical problem in the prior art of uneven distribution of the coating liquid, resulting in low coating quality on the glass surface after coating.

Description

Technical Field

[0001] The present application belongs to the field of glass processing technology, and in particular relates to a glass coating method and device, photovoltaic glass and solar cells. Background Art

[0002] As needed, functional films are coated on the surface of glass substrates such as ultra-thin electronic glass and photovoltaic glass through a roller coating machine to optimize the performance of the glass. For example, an anti-reflection film is currently coated on the surface of photovoltaic glass through a roller coating machine to reduce reflection, increase the transmittance of photovoltaic glass to sunlight, and improve the output power of silicon cells encapsulated in photovoltaic glass.

[0003] However, when coating the glass substrate surface with roller coating, the coating liquid is usually poured directly from the top of the coating roller to the surface of the coating roller. Taking the coating on the surface of photovoltaic glass as an example, pouring the coating liquid directly from the top of the coating roller can easily cause uneven distribution of the coating liquid on the surface of the coating roller. The coating liquid is also easily dripped onto the surface of the photovoltaic glass at the position where the coating liquid is more distributed, causing the coating quality of the photovoltaic glass surface to decrease and affecting the performance of the photovoltaic glass. Therefore, in the prior art, the coating liquid is unevenly distributed when coating with a roller coating machine, resulting in a defect of low coating quality on the glass surface after coating. Summary of the invention

[0004] In view of this, the present application provides a glass coating method and device, photovoltaic glass and solar cell, which are used to solve the technical problem in the prior art that the coating liquid is unevenly distributed, resulting in low coating quality on the glass surface after coating.

[0005] In a first aspect, the present application provides a glass coating device, the glass coating device comprising a coating liquid storage device and a coating unit, the coating unit comprising a coating liquid delivery pipe, a hollow roller brush and a coating roller;

[0006] One end of the coating liquid delivery pipe is connected to the coating liquid reservoir, and the other end is connected to the hollow roller brush, so as to deliver the coating liquid stored in the coating liquid reservoir to the hollow roller brush;

[0007] The lower surface of the hollow roller brush is hollow bristles distributed at equal intervals. The hollow brush is used to divert the coating liquid transmitted to the hollow roller brush and then brush it on the surface of the coating roller along the rotation direction of the coating roller.

[0008] Preferably, the glass coating device further comprises a two-way ball valve;

[0009] One end of the two-way ball valve is connected to the coating liquid delivery pipe, and the other end is connected to the hollow roller brush, so as to connect the coating liquid delivery pipe and the hollow roller brush;

[0010] Preferably, the glass coating device further comprises a coating liquid delivery pipe regulating device;

[0011] The coating liquid delivery pipe adjustment device includes a coating liquid delivery pipe vertical height adjustment device;

[0012] The coating liquid delivery pipe vertical height adjustment device clamps the corrugated section of the coating liquid delivery pipe to adjust the vertical height of the coating liquid delivery pipe;

[0013] The corrugated section of the coating liquid delivery pipe is a vertical corrugated section of the coating liquid delivery pipe.

[0014] It should be noted that the corrugated section is a retractable section of the coating liquid delivery pipe. The vertical corrugated section of the coating liquid delivery pipe can be compressed or stretched to achieve the effect of shortening or lengthening the length of the coating liquid delivery pipe, thereby driving the hollow roller brush to increase or decrease the distance from the coating roller, and the hollow roller brushing the coating roller to increase or decrease the wetting thickness, thereby adjusting the coating thickness of the coated glass.

[0015] Preferably, the coating liquid delivery pipe regulating device further comprises a coating liquid delivery pipe parallel regulating device, and the corrugated section of the coating liquid delivery pipe is a parallel corrugated section of the coating liquid delivery pipe;

[0016] The coating liquid delivery pipe parallel adjustment device clamps the parallel corrugated section of the coating liquid delivery pipe to adjust the parallel length of the coating liquid delivery pipe.

[0017] It should be noted that the corrugated section is a retractable section of the coating liquid delivery pipe. The parallel corrugated section of the coating liquid delivery pipe can be compressed or stretched to achieve the effect of parallel movement of the coating liquid delivery pipe, thereby driving the hollow roller brush to move parallely, thereby adjusting the hollow bristles of the hollow roller brush to be directly above the coating roller, so that the coating liquid after diversion by the hollow roller brush can be coated on the surface of the coating roller, avoiding direct dripping of the coating roller to the side of the coating roller.

[0018] Preferably, the coating liquid delivery pipe regulating device comprises a servo motor and a coating liquid delivery pipe regulating unit, and the coating liquid delivery pipe regulating unit comprises a first bevel gear, a second bevel gear, a threaded rod, an internal threaded slider, and a clamping component;

[0019] The output shaft of the servo motor fixes the first bevel gear, so that the first bevel gear rotates synchronously with the output shaft of the servo motor;

[0020] The second bevel gear is fixed to the end of the threaded rod, so that the threaded rod rotates synchronously with the second bevel gear;

[0021] The first bevel gear and the second bevel gear mesh with each other so that the rotation of the output shaft of the servo motor is transmitted to the threaded rod perpendicular to the output shaft of the servo motor;

[0022] Two internal thread sliders are sleeved on the threaded rod, so that the two internal thread sliders move relative to or towards each other as the threaded rod rotates;

[0023] One end of any one of the two clamping components clamps the corrugated section of the coating liquid delivery pipe, and the other end is fixed to the outer sides of the two internal threaded sliders, so that when the internal threaded sliders move relative to or toward each other, the corrugated section of the coating liquid delivery pipe is compressed or stretched through the clamping components.

[0024] It should be noted that the shape and size of the clamping component fits the shape and size of the coating liquid delivery pipe and is determined according to the shape of the coating liquid delivery pipe.

[0025] Preferably, the coating liquid delivery pipe adjusting device further comprises a limit frame, and the limit frame is located between the second bevel gear and the internal thread slider.

[0026] It should be noted that the maximum moving distance of the internal thread sliders moving relative to or toward each other can be limited by setting the limit frame.

[0027] Preferably, the coating liquid delivery pipe regulating device comprises a second coating liquid delivery pipe regulating unit; the second coating liquid delivery pipe regulating unit and the coating liquid delivery pipe regulating unit are symmetrically distributed along the coating liquid delivery pipe.

[0028] It should be noted that the second coating liquid delivery pipe regulating unit has the same structural composition as the coating liquid delivery pipe regulating unit and is symmetrically distributed, so that the coating liquid delivery pipe can move synchronously under the drive of the servo motor.

[0029] Preferably, a self-operated flow regulating valve is arranged between the two-way ball valve and the hollow roller brush.

[0030] It should be noted that the self-operated flow control valve does not require an external power supply and secondary instruments. It can effectively adjust the properties of the fluid medium only by relying on the output signal of the regulated medium. This not only greatly saves the cost of some additional accessories, but also reduces energy use.

[0031] Preferably, the glass coating device further comprises a cleaning liquid reservoir, a centrifugal pump and a flow regulating switch;

[0032] The cleaning fluid reservoir is used for storing cleaning fluid;

[0033] The centrifugal pump is connected to the coating liquid reservoir and the cleaning liquid reservoir, and is used to generate centrifugal force to transfer the coating liquid or the cleaning liquid to the coating liquid delivery pipe through the centrifugal pump pipe respectively;

[0034] The flow regulating switch is communicated with the centrifugal pump and is used for adjusting the flow of the coating liquid or the cleaning liquid delivered to the coating liquid delivery pipe.

[0035] Preferably, the glass coating further comprises a second coating unit, a T-type three-way ball valve and a sealing locking device;

[0036] The parallel interfaces of the T-type three-way ball valve are respectively connected to the coating unit and the second coating unit;

[0037] The sealing and locking device is used to lock the coating liquid delivery pipe in the coating unit, the second coating liquid delivery pipe in the second coating unit, and the interface between the centrifugal pump pipe and the three-way ball valve;

[0038] The coating unit and the second coating unit are symmetrically distributed along the three-way ball valve.

[0039] Preferably, the glass coating device further comprises an infrared automatic height control device;

[0040] The infrared automatic height control device is fixedly connected to the coating roller and is used to control the lifting and lowering of the coating roller.

[0041] It should be noted that the infrared automatic height control device is arranged on both sides of the coating roller. The device can monitor the distance from the coating roller to the hollow roller brush. When the glass coating device coats the glass of different thicknesses to be coated, the hollow roller brush rises / falls perpendicular to the direction of the glass, and the infrared transmitting device transmits the program electrical signal to the infrared receiving device of the single-chip microcomputer. After receiving the signal, the infrared receiving device automatically controls the motor lifting device to realize the lifting and lowering operation of the coating roller, so as to adjust the distance between the coating roller and the glass to adapt to the glass of different thicknesses to be coated.

[0042] Preferably, the glass coating device further comprises a transmission device, a conveying belt and a hard carrier; the outer layer of the transmission device is covered with a conveying belt, so that the transmission device drives the conveying belt to move;

[0043] The outer layer of the conveyor belt is covered with a hard carrier plate, so that the hard carrier plate moves with the conveyor belt.

[0044] It should be noted that the hard carrier plate moving with the conveyor belt can provide support for the glass, so as to prevent the glass from being severely deformed due to squeezing by the coating roller during the coating process, thereby ensuring the uniformity and quality of the surface film layer of the glass after coating and improving the coating quality of the glass.

[0045] A second aspect of the present application provides a method for coating using the above-mentioned glass coating device, the method comprising the steps of:

[0046] Step S1, using a first coating roller in a coating unit and a second coating roller in a second coating unit to coat the surfaces of a first glass substrate and a second glass substrate respectively, to obtain a first glass and a second glass;

[0047] Step S2, using an infrared automatic height control device to control the first coating roller in the coating unit and the second coating roller in the second coating unit to rise, so that the first glass and the second glass pass under the first coating roller and the second coating roller;

[0048] Step S3, controlling the first coating roller in the coating unit and the second coating roller in the second coating unit to descend to a coating height;

[0049] Step S4, repeat steps S1-S3.

[0050] A third aspect of the present application provides a photovoltaic glass, which includes a photovoltaic glass substrate and an anti-reflection film, wherein the anti-reflection film is coated on the surface of the photovoltaic glass substrate by the above-mentioned photovoltaic glass coating device.

[0051] A fourth aspect of the present application provides a solar cell, which comprises the above-mentioned photovoltaic glass and a silicon cell, wherein the photovoltaic glass encapsulates the cell.

[0052] The cell is selected from monocrystalline silicon, polycrystalline silicon or amorphous silicon cell.

[0053] In summary, the present application provides a glass coating method and device, photovoltaic glass and solar cell. The glass coating device includes a coating liquid storage device, a coating liquid delivery pipe, a hollow roller brush and a coating roller. The coating liquid delivery pipe can deliver the coating liquid stored in the coating liquid storage device to the hollow roller brush, and the hollow bristles on the lower surface of the hollow roller brush can brush the coating liquid on the surface of the coating roller along the rotation direction of the coating roller, thereby reducing the occurrence of sputtering caused by the coating liquid being poured directly from the top of the coating roller downward onto the surface of the coating roller. At the same time, the hollow bristles are evenly distributed on the lower surface of the hollow roller brush, and can divert the coating liquid delivered from the coating liquid delivery pipe to the hollow roller brush and evenly coat it on the surface of the coating roller along the rotation direction of the coating roller, thereby improving the uniformity of distribution of the coating liquid on the surface of the coating roller, which is beneficial to improving the quality of glass coating, thereby solving the technical problem in the prior art that the coating liquid is unevenly distributed, resulting in low coating quality on the glass surface after coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0055] Figure 1 A schematic diagram of a photovoltaic glass coating device provided in Example 1 of the present application;

[0056] Figure 2A schematic diagram of the photovoltaic glass coating device provided in Example 1 of the present application performing coating;

[0057] Figure 3 A schematic diagram of the microstructure of a photovoltaic glass coating device provided in Example 1 of the present application;

[0058] In the figure, the reference numerals are respectively: coating liquid storage device 1, coating liquid delivery pipe 2, hollow roller brush 3, coating roller 4, hollow bristles 5, two-way ball valve 6, coating liquid delivery pipe vertical height adjustment device 7, vertical corrugated section of coating liquid delivery pipe 8, parallel adjustment device of coating liquid delivery pipe 9, parallel corrugated section of coating liquid delivery pipe 10, output shaft 11 of servo motor, first bevel gear 12, second bevel gear 13, threaded rod 14, internal thread slider 15, clamping component 16, second adjustment unit of coating liquid delivery pipe 17, cleaning liquid reservoir 18, centrifugal pump 19, flow regulating switch 20, centrifugal pump pipe 21, T-type three-way ball valve 22, sealing locking device 23, limit frame 24, hard carrier plate 25, conveying belt 26, coated photovoltaic glass 27, infrared automatic height control device 28. DETAILED DESCRIPTION

[0059] The present application provides a glass coating method and device, photovoltaic glass and solar cell, which are used to solve the technical problem in the prior art that the coating liquid is unevenly distributed, resulting in low coating quality on the surface of the photovoltaic glass after coating.

[0060] The following will take the glass coating method and device provided by the present application for coating on the surface of photovoltaic glass as an example, and combine with the accompanying drawings to clearly and completely describe the technical solution of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work, such as using the glass coating method and device provided by the present application for coating ultra-thin electronic glass or other glass substrates, are within the scope of protection of the present application.

[0061] Example 1

[0062] In view of the fact that when the existing roller coating machine coats the surface of photovoltaic glass, the coating liquid is usually poured directly from the top of the coating roller downward onto the surface of the coating roller, which causes defects such as easy sputtering and uneven distribution of the coating liquid and reduced coating quality, the present embodiment provides a photovoltaic glass coating device, wherein the photovoltaic glass coating device comprises a coating liquid storage device and a coating unit, the coating liquid storage device is used to store the coating liquid and is connected to the coating unit, the coating unit comprises a coating liquid delivery pipe, a hollow roller brush and a coating roller; one end of the coating liquid delivery pipe is connected to the coating liquid storage device, and the other end is connected to the hollow roller brush, which is used to transfer the coating liquid stored in the coating liquid storage device to the hollow roller brush, the lower surface of the hollow roller brush is hollow bristles distributed at equal intervals, and the hollow brush is used to divert the coating liquid delivered to the hollow roller brush and then rotate along the coating roller The coating liquid is brushed on the coating roller surface in the direction of rotation; since the coating liquid delivery pipe can deliver the coating liquid stored in the coating liquid storage device to the hollow roller brush, and the hollow bristles on the lower surface of the hollow roller brush can brush the coating liquid on the coating roller surface along the rotation direction of the coating roller, the coating liquid is poured directly from the top of the coating roller downward onto the coating roller surface to cause sputtering. At the same time, the hollow bristles are evenly distributed on the lower surface of the hollow roller brush, and the coating liquid delivered from the coating liquid delivery pipe to the hollow roller brush can be diverted and evenly coated on the coating roller surface along the rotation direction of the coating roller, thereby improving the uniformity of distribution of the coating liquid on the coating roller surface, which is beneficial to improving the coating quality of the photovoltaic glass and solves the technical problem in the prior art that the coating liquid is unevenly distributed, resulting in low coating quality on the surface of the photovoltaic glass after coating.

[0063] Preferably, the photovoltaic glass coating device also includes a coating liquid delivery pipe adjusting device, which includes a coating liquid delivery pipe vertical height adjusting device and a coating liquid delivery pipe parallel adjusting device; the coating liquid delivery pipe vertical height adjusting device compresses or stretches the vertical corrugated section of the coating liquid delivery pipe, thereby achieving the effect of shortening or lengthening the length of the coating liquid delivery pipe, driving the hollow roller brush to increase or decrease the distance from the coating roller, and increasing or decreasing the wetting thickness of the hollow roller brushing the coating roller, thereby adjusting the coating thickness of the coated glass; and the coating liquid delivery pipe parallel adjusting device compresses or stretches the parallel corrugated section of the coating liquid delivery pipe, thereby driving the hollow roller brush to move in parallel, thereby adjusting the hollow bristles of the hollow roller brush to be located directly above the coating roller, so that the coating liquid after diversion by the hollow roller brush can be coated on the surface of the coating roller, avoiding the coating roller directly dripping on the side of the coating roller.

[0064] Preferably, the present application provides a specific structure of a coating liquid delivery pipe adjustment device, which includes a servo motor and a coating liquid delivery pipe adjustment unit, wherein the coating liquid delivery pipe adjustment unit includes a first bevel gear, a second bevel gear, a threaded rod, an internally threaded slider, and a clamping component; wherein the output shaft of the servo motor fixes the first bevel gear so that the first bevel gear rotates synchronously with the output shaft of the servo motor; the second bevel gear is fixed to the end of the threaded rod so that the threaded rod rotates synchronously with the second bevel gear; the first bevel gear and the second bevel gear are meshed with each other so that the rotation of the output shaft of the servo motor is transmitted to the threaded rod perpendicular to the output shaft of the servo motor; two internally threaded sliders are sleeved on the threaded rod so that the two internally threaded sliders move relative to or toward each other as the threaded rod rotates; one end of any one of the two clamping components respectively clamps the corrugated section of the coating liquid delivery pipe, and the other end is respectively fixed to the outer sides of the two internally threaded sliders, so that when the internally threaded sliders move relative to or toward each other, the corrugated section of the coating liquid delivery pipe is driven to be compressed or stretched through the clamping component.

[0065] Preferably, the specific structure of the coating liquid delivery pipe adjusting device also includes a second coating liquid delivery pipe adjusting unit, and the second coating liquid delivery pipe adjusting unit and the coating liquid delivery pipe adjusting unit are symmetrically distributed along the coating liquid delivery pipe; the second coating liquid delivery pipe adjusting unit has the same structural composition as the coating liquid delivery pipe adjusting unit and is symmetrically distributed, and the second output shaft in the second adjusting unit and the output shaft of the coating liquid delivery pipe adjusting device are connected to the same servo motor, so that the coating liquid delivery pipe can move synchronously under the drive of the servo motor.

[0066] Preferably, the specific structure of the coating liquid delivery pipe regulating device further includes a limit frame, which is located between the second bevel gear and the internal thread slider, and is used to limit the maximum moving distance of the internal thread slider relative to or towards each other.

[0067] Preferably, the photovoltaic glass coating device also includes a cleaning liquid reservoir, a centrifugal pump and a flow regulating switch; the cleaning liquid reservoir is used to store cleaning liquid; the centrifugal pump is connected to the coating liquid reservoir and the cleaning liquid reservoir, and is used to generate centrifugal force to transmit the coating liquid or the cleaning liquid to the coating liquid delivery pipe through the centrifugal pump pipe respectively; the flow regulating switch is connected to the centrifugal pump, and is used to adjust the flow of the coating liquid or the cleaning liquid transmitted to the coating liquid delivery pipe; wherein, the photovoltaic glass coating device provided in the present application can clean the coating roller after coating, which is beneficial to reduce the coating liquid remaining on the coating roller after coating of the previous batch of coating liquid, and improve the quality of the photovoltaic glass after coating.

[0068] Preferably, the photovoltaic glass coating device provided in the present application also includes an infrared automatic height control device; wherein, when encountering coated photovoltaic glass of different thicknesses, after the coating liquid delivery pipe adjustment device adjusts the hollow roller brush to rise / fall perpendicular to the direction of the glass, the infrared transmitting device transmits the program electrical signal to the infrared receiving device of the single-chip microcomputer, and after receiving the signal, the infrared receiving device automatically controls the motor lifting device to realize the lifting and lowering operation of the coating roller, thereby adjusting the distance between the coating roller and the glass, and realizing coating of coated photovoltaic glass of different thicknesses.

[0069] Preferably, the photovoltaic glass coating device also includes a transmission device, a conveyor belt and a hard carrier; the transmission device is covered with a conveyor belt on the outer layer, so that the transmission device drives the conveyor belt to move; the outer layer of the conveyor belt is covered with a hard carrier, so that the hard carrier moves with the conveyor belt; wherein, the hard carrier that moves with the conveyor belt can provide supporting force for the glass, so that during the coating process, the glass can be prevented from being severely deformed due to the squeezing of the coating roller, thereby ensuring the uniformity and quality of the surface film layer of the photovoltaic glass after coating, and improving the coating quality of the photovoltaic glass.

[0070] Preferably, the photovoltaic glass coating device provided in the present application also includes a second coating unit, a T-type three-way ball valve and a sealing locking device; the parallel interfaces of the T-type three-way ball valve are respectively connected to the coating unit and the second coating unit; the sealing locking device is used to lock the coating liquid delivery pipe in the coating unit, the second coating liquid delivery pipe in the second coating unit, and the interface between the centrifugal pump pipe and the three-way ball valve; the coating unit and the second coating unit are symmetrically distributed along the three-way ball valve.

[0071] Example 2

[0072] The present embodiment provides a method for coating using the photovoltaic glass coating device described in Example 1. After the first two coated photovoltaic glasses are coated, the coating method performs coating again to achieve continuous coating. The coating process includes the steps of step S1, using the first coating roller in the coating unit and the second coating roller in the second coating unit to coat the surfaces of the first photovoltaic glass substrate and the second photovoltaic glass substrate respectively to obtain the first photovoltaic glass and the second photovoltaic glass; step S2, using an infrared automatic height control device to control the first coating roller in the coating unit and the second coating roller in the second coating unit to rise, so that the first photovoltaic glass and the second photovoltaic glass pass under the first coating roller and the second coating roller; step S3, controlling the first coating roller in the coating unit and the second coating roller in the second coating unit to descend to the coating height; step S4, repeating steps S1-S3.

[0073] During the coating process, determine the running speed of the conveyor belt and calculate the distances x, a and b (see Appendix Figure 2) The time t1, t2, t3 required for the coating roller to run on the coated photovoltaic glass is then set to t3. After t3, the coated photovoltaic glass passes through the coating liquid delivery pipe vertical height adjustment device and the infrared automatic height control device, thereby lifting the coating roller (the lifting time is t2, and the distance between the roller and the glass is ≥c+0.3mm after t2). After t1, the two coated glasses are transported out of the coating area. At this time, there are glasses to be coated under the left and right coating rollers, and coating continues to be carried out, realizing a continuous coating process.

[0074] Example 3

[0075] This embodiment provides a photovoltaic glass, and the anti-reflection film on the surface of the photovoltaic glass is obtained by coating with an anti-reflection coating liquid selected by the photovoltaic glass coating device described in Example 1 or by coating with an anti-reflection coating liquid selected by the coating method described in Example 2.

[0076] The surface of the photovoltaic glass provided in this embodiment is coated with an anti-reflection film, which has good light transmittance and is beneficial to improving the performance of the photovoltaic glass.

[0077] Example 4

[0078] This embodiment provides a solar cell, which comprises photovoltaic glass and a cell sheet encapsulated therein, wherein the electrode sheet is a single crystal silicon, polycrystalline silicon or amorphous silicon cell sheet, and the photovoltaic glass is the photovoltaic glass described in Example 3.

[0079] The photovoltaic glass of the solar cell encapsulation cell provided in this embodiment has good light transmittance, which is beneficial for the cell to convert light energy into electrical energy, and the solar cell has high power generation efficiency.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A glass coating device, characterized in that: The glass coating device comprises a coating liquid storage device and a coating unit, wherein the coating unit comprises a coating liquid delivery pipe, a hollow roller brush and a coating roller; One end of the coating liquid delivery pipe is connected to the coating liquid reservoir, and the other end is connected to the hollow roller brush, so as to deliver the coating liquid stored in the coating liquid reservoir to the hollow roller brush; The lower surface of the hollow roller brush is hollow bristles distributed at equal intervals, and the hollow brush is used to divert the coating liquid transmitted to the hollow roller brush and then brush it on the surface of the coating roller along the rotation direction of the coating roller; The glass coating device also includes a coating liquid delivery pipe regulating device; The coating liquid delivery pipe adjustment device comprises a coating liquid delivery pipe vertical height adjustment device and a coating liquid delivery pipe parallel adjustment device; The coating liquid delivery pipe vertical height adjustment device clamps the vertical corrugated section of the coating liquid delivery pipe to adjust the vertical height of the coating liquid delivery pipe; The coating liquid delivery pipe parallel adjustment device clamps the parallel corrugated section of the coating liquid delivery pipe to adjust the parallel length of the coating liquid delivery pipe.

2. A glass coating device according to claim 1, characterized in that: The coating liquid delivery pipe regulating device comprises a second coating liquid delivery pipe regulating unit; the second coating liquid delivery pipe regulating unit and the coating liquid delivery pipe regulating unit are symmetrically distributed along the coating liquid delivery pipe.

3. A glass coating device according to claim 1, characterized in that: The glass coating device also includes a cleaning liquid reservoir, a centrifugal pump and a flow regulating switch; The cleaning fluid reservoir is used for storing cleaning fluid; The centrifugal pump is connected to the coating liquid reservoir and the cleaning liquid reservoir, and is used to generate centrifugal force to transfer the coating liquid or the cleaning liquid to the coating liquid delivery pipe through the centrifugal pump pipe respectively; The flow regulating switch is communicated with the centrifugal pump and is used for adjusting the flow of the coating liquid or the cleaning liquid delivered to the coating liquid delivery pipe.

4. A glass coating device according to claim 1, characterized in that: The glass coating also includes a second coating unit, a T-type three-way ball valve and a sealing locking device; The parallel interfaces of the T-type three-way ball valve are respectively connected to the coating unit and the second coating unit; The sealing and locking device is used to lock the coating liquid delivery pipe in the coating unit, the second coating liquid delivery pipe in the second coating unit, and the interface between the centrifugal pump pipe and the three-way ball valve; The coating unit and the second coating unit are symmetrically distributed along the three-way ball valve.

5. The method for coating a glass coating device according to claim 4, characterized in that: Includes steps: Step S1, using a first coating roller in a coating unit and a second coating roller in a second coating unit to coat the surfaces of a first glass substrate and a second glass substrate respectively, to obtain a first glass and a second glass; Step S2, using an infrared automatic height control device to control the first coating roller in the coating unit and the second coating roller in the second coating unit to rise, so that the first glass and the second glass pass under the first coating roller and the second coating roller; Step S3, controlling the first coating roller in the coating unit and the second coating roller in the second coating unit to descend to a coating height; Step S4, repeat steps S1-S3.

6. A photovoltaic glass, characterized in that: It comprises a photovoltaic glass substrate and an anti-reflection film, wherein the anti-reflection film is coated on the surface of the photovoltaic glass substrate by the photovoltaic glass coating device according to any one of claims 1 to 4.

7. A solar cell, characterized in that: The solar cell comprises the photovoltaic glass according to claim 6 and a silicon cell, and the photovoltaic glass encapsulates the cell.

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